更新时间：2022-03-18 22:28:48
使用带有STUFF的GROUP BY： http://***.com/questions/16922073/use-coalesce-with-group-by 一> [ ^ ]
Use GROUP BY with STUFF: http://***.com/questions/16922073/use-coalesce-with-group-by[^]
SQL Query用于连接多行的列值
